OH yes. I think I decided early on that Tosha almost never swears by his gods because you don't call Their attention unless you really, really want it, and he doesn't swear by Merlin because he actually doesn't give a fuck about Merlin, so from there I had to go really afield.

I lost the habit of coming up with really good ones when the drugs started eating my brain, but "Mordred's mercy" was definitely one of my favorites, too. Because yes, oh, the implications. And I liked the Urania's mercy one, but Hypatia's sextant wins for my favorite of Siz's. :)